ALPINE-CVE-2023-4091
- Source
- https://security.alpinelinux.org/vuln/CVE-2023-4091
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2023-4091.json
- JSON Data
- https://api.osv.dev/v1/vulns/ALPINE-CVE-2023-4091
- Upstream
- Published
- 2023-11-03T08:15:08Z
- Modified
- 2026-08-27T22:18:02Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- [none]
- Details
-
A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module "acl_xattr" is configured with "acl_xattr:ignore system acls = yes". The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions.
- References